A complete safety, timing, and dosage guide for combining CBD (Cannabidiol) with Vitamin K (K1, K2) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can take vitamin K (K1, K2) and CBD (cannabidiol) together — no significant interaction exists between them, so combining them is safe for most people.
Vitamin K and CBD together are considered a safe, neutral combination. There is no known mechanism for a meaningful interaction, and each supplement works through independent pathways. In practice, you can take vitamin K (K1, K2) + CBD without worrying about reduced effectiveness or increased side effects.
Vitamin K is a fat-soluble vitamin absorbed in the small intestine alongside dietary fat. It acts as a cofactor for enzymes that activate clotting proteins and bone-related proteins. CBD is also fat-soluble and is metabolized primarily in the liver by cytochrome P450 enzymes, especially CYP3A4 and CYP2C19. Vitamin K, on the other hand, is metabolized mainly by a separate enzyme called CYP4F2, so CBD does not meaningfully interfere with vitamin K's breakdown or function. Both compounds are lipophilic, so taking them together with a meal containing fat can support absorption, but they do not compete for the same transporter or receptor in a clinically significant way. Because CBD can inhibit some CYP enzymes, people taking blood thinners like warfarin (a vitamin K antagonist) should be monitored — but that caution is about the medication, not about combining vitamin K and CBD directly.
If you are taking both, the simplest approach is to take vitamin K and CBD together at the same meal, ideally dinner, since dietary fat improves absorption of both. There is no need to space them by minutes or hours, as their absorption pathways do not meaningfully interfere. If you take CBD for sleep, pair your vitamin K with that same evening meal to create a consistent routine. If you miss a dose, take it as soon as you remember unless your next dose is within a few hours — then skip and continue normally. For vitamin K2, choose MK-7 for once-daily dosing; for CBD, a tincture taken under the tongue for 60 seconds followed by your meal works well. Consistency matters more than exact timing, so establish a daily habit.
Vitamin K exists as K1 (phylloquinone) from leafy greens and K2 (menaquinones) from fermented foods and animal products; MK-7, a form of K2, has a longer half-life and is more consistently absorbed. CBD is available as an isolate, broad-spectrum, or full-spectrum extract — the latter contains other cannabinoids and terpenes, which may influence the 'entourage effect' but do not alter the interaction with vitamin K. Regardless of your chosen form, both vitamin K and CBD are fat-soluble, so pairing them with a meal containing healthy fats improves bioavailability. The neutral interaction holds across these forms, so choose products based on quality, third-party testing, and your personal needs rather than concerns about this combination.
Yes, you can take vitamin K and CBD at the same time. There is no known interaction, and taking both together with a meal containing fat may actually help absorption. I would simply recommend pairing them with food for best results.
Yes, it is safe to combine vitamin K with CBD every day for most healthy adults. Neither supplement appears to reduce the other's effectiveness over time. Just keep your doses consistent and monitor how you feel, especially during the first few weeks.
You do not need to wait between vitamin K and CBD. Taking them together is fine, so I usually tell patients to pair both with a meal to make the habit easier.
No, vitamin K and CBD do not compete for absorption in a clinically meaningful way. Both are fat-soluble, but they use different absorption routes and transport mechanisms in the gut. Even at higher doses, you do not need to separate them.
People on blood thinners like warfarin should avoid adding CBD without close medical monitoring, since the combination of vitamin K and CBD can complicate anticoagulant control. Pregnant or breastfeeding women should also avoid CBD. For everyone else, the combination appears safe.
I recommend taking vitamin K and CBD with food, specifically a meal that contains some dietary fat. Fat helps your body absorb both the fat-soluble vitamin K and the lipophilic CBD. An empty stomach may reduce absorption and can increase the chance of GI upset from CBD.
Reviewed by Caroline M. on April 10, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.